CN113653044A - Construction method of deep soft soil pipe pile - Google Patents
Construction method of deep soft soil pipe pile Download PDFInfo
- Publication number
- CN113653044A CN113653044A CN202110913393.5A CN202110913393A CN113653044A CN 113653044 A CN113653044 A CN 113653044A CN 202110913393 A CN202110913393 A CN 202110913393A CN 113653044 A CN113653044 A CN 113653044A
- Authority
- CN
- China
- Prior art keywords
- pile body
- pile
- transverse plate
- wall
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 17
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 238000005260 corrosion Methods 0.000 claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 238000004021 metal welding Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 3
- 239000011372 high-strength concrete Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a construction method of a deep soft soil pipe pile, which comprises the following steps: s1, pile making: the length of each single-section pile is 8-12 meters, and the inner diameter of the lower-section pile body is larger than the outer diameter of the upper-section pile body; a horizontal bearing platform is arranged on the inner wall of the upper end of the pile body, and an inward-concave notch is formed in the upper surface of the bearing platform; s2, piling: lofting a pile position by using a total station, driving a pile body into a designed position by using a pile driver, and if the perpendicularity deviation of the pile body is more than 1%, correcting the pile body and then driving the pile; s3, pile splicing: the upper pile body is hoisted and installed to the lower pile body, a groove platform of the upper pile body is ensured to be inserted into a groove opening of the lower pile body, a cavity is formed between the outer wall of the lower end of the upper pile body and the inner wall of the upper end of the lower pile body, the upper end of the lower pile body is connected with the lower end of the upper pile body through a connecting piece, and anti-corrosion slurry is injected. The invention realizes the anti-corrosion construction of the joint.
Description
Technical Field
The invention relates to the field of bottle washing machines. More specifically, the invention relates to a construction method of a deep soft soil pipe pile.
Background
At present, the design of building engineering pile foundation adopts prestressed high-strength concrete pipe piles more and more common. But the prestressed high-strength concrete pipe pile often meets the problems of joint rust prevention, excavation deformation and other related engineering problems in deep soft soil stratum. The construction process for the tubular pile in the deep soft soil layer is provided by combining the existing tubular pile project in the deep soft soil region and analyzing and researching the related problems encountered in the tubular pile construction.
Disclosure of Invention
To achieve these objects and other advantages in accordance with the present invention, there is provided a deep soft soil pipe pile construction method, comprising the steps of:
s1, pile making: the length of each single-section pile is 8-12 meters, and the inner diameter of the lower-section pile body is larger than the outer diameter of the upper-section pile body; a horizontal bearing platform is arranged on the inner wall of the upper end of the pile body, an inward-concave notch is formed in the upper surface of the bearing platform, and a metal welding plate is embedded in the outer wall of the upper end of the pile body; the bottom ends of all the pile bodies except the lowest pile body are provided with convex groove tables, the groove tables of the upper pile body are arranged to be capable of being inserted into the groove openings of the lower pile body, and the outer wall of the lower end of each pile body is embedded with a metal welding plate;
s2, piling: lofting a pile position by using a total station, driving a pile body into a designed position by using a pile driver, and if the perpendicularity deviation of the pile body is more than 1%, correcting the pile body and then driving the pile;
s3, pile splicing: the upper pile body is hoisted and mounted to the lower pile body, a groove platform of the upper pile body is ensured to be inserted into a groove opening of the lower pile body, a cavity is formed between the outer wall of the lower end of the upper pile body and the inner wall of the upper end of the lower pile body, the upper end of the lower pile body is connected with the lower end of the upper pile body through a connecting piece, and anti-corrosion slurry is injected;
the connector includes: the grouting hard pipe comprises a vertical plate, a first transverse plate, a second transverse plate and a grouting hard pipe, wherein the vertical plate is arranged around the outer wall of a lower pile body in a surrounding mode, the top end of the vertical plate is higher than the top surface of the lower pile body, the top end of the vertical plate is connected with the first transverse plate into a whole, the first transverse plate extends to a metal welding plate at the lower end of the upper pile body, the second transverse plate is located right below the first transverse plate, one end of the second transverse plate is connected with the vertical plate into a whole, the other end of the second transverse plate extends to be in contact with the outer wall of an upper pile body, the lower end of the grouting hard pipe sequentially penetrates through the first transverse plate and the second transverse plate to enter the cavity, and the grouting hard pipe is in threaded connection with the first transverse plate and the second transverse plate;
the concrete steps of connecting the upper end of the lower pile body and the lower end of the upper pile body through a connecting piece and injecting anti-corrosion slurry are as follows: the connecting piece penetrates through the outer wall of the upper pile body, the second transverse plate is supported through the top surface of the lower pile body, the first transverse plate and the metal welding plate at the lower end of the upper pile body are welded, the vertical plate and the metal welding plate at the upper end of the lower pile body are welded, anti-corrosion slurry is synchronously injected into the cavity through the grouting hard pipe during welding, and after the cavity is filled with the anti-corrosion slurry, the grouting hard pipe is rotated to enable the grouting hard pipe to reach the bottom of the cavity.
And S4, continuously piling the pile foundation after pile splicing is finished through the pile driver, and repeating the steps S3 and S4 until the pile foundation reaches the design depth.
Preferably, the wall thickness of the pile body of the single-section pile is 90-120 mm.
Preferably, the bearing platform and the pile body are integrally cast.
Preferably, a layer of self-adhesive glue is coated in the notch.
Preferably, in step S2, a pile tip is fixed to the bottom end surface of the lowermost pile shaft before pile driving.
Preferably, the distance between the horizontal bearing platform and the top surface of the lower pile body is 60-90 cm.
Preferably, a plurality of grouting hard pipes are arranged along the circumferential direction of the connecting piece.
The invention at least comprises the following beneficial effects: the invention is applied to the deep soft soil environment, the joints of the upper pile body and the lower pile body are particularly easy to corrode, and the performance of the pile foundation is influenced, so that the pile foundation is designed to be that the diameter between single pile foundations is gradually reduced from bottom to top, the cavity between two pile foundations with different diameters is filled with anti-corrosion slurry, and the anti-corrosion construction of the pile foundation joint is realized through the sealing of the connecting plate.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of the connection of two pile foundations of the present invention;
fig. 2 is a detail view of the joint of two pile foundations of the invention.
Description of reference numerals: 1 upper pile body, 2 lower pile bodies, 3 bearing platforms, 4 notches, 5 metal welding plates, 6 cavities, 7 vertical plates, 8 first transverse plates, 9 second transverse plates, 10 grouting hard pipes, 11 self-adhesive glue and 12 groove platforms.
Detailed Description
The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before the present invention is described in detail with reference to the accompanying drawings, it is to be noted that: the technical solutions and features provided in the present invention in the respective sections including the following description may be combined with each other without conflict.
Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
The invention is further described in detail with reference to the accompanying drawings and implementation, and the specific implementation process is as follows:
as shown in fig. 1-2, the invention provides a construction method of a deep soft soil pipe pile, which comprises the following steps:
s1, pile making: the length of each single-section pile is 8-12 meters, and the inner diameter of the lower-section pile body 2 is larger than the outer diameter of the upper-section pile body 1; a horizontal bearing platform 3 is arranged on the inner wall of the upper end of the pile body, an inward-concave notch 4 is formed in the upper surface of the bearing platform 3, and a metal welding plate 5 is embedded in the outer wall of the upper end of the pile body; except for the lowest pile body, the bottom ends of all the pile bodies are provided with convex groove platforms 12, the groove platforms 12 of the upper pile body 1 can be inserted into the groove openings 4 of the lower pile body 2, and the outer wall of the lower end of each pile body is embedded with a metal welding plate 5;
s2, piling: lofting a pile position by using a total station, driving a pile body into a designed position by using a pile driver, and if the perpendicularity deviation of the pile body is more than 1%, correcting the pile body and then driving the pile;
s3, pile splicing: the upper pile body 1 is hoisted and mounted to the lower pile body 2, a groove 12 of the upper pile body 1 is ensured to be inserted into a groove opening 4 of the lower pile body 2, a cavity 6 is formed between the outer wall of the lower end of the upper pile body 1 and the inner wall of the upper end of the lower pile body 2, the upper end of the lower pile body 2 is connected with the lower end of the upper pile body 1 through a connecting piece, and anti-corrosion slurry is injected;
the connector includes: the grouting pile comprises a vertical plate 7, a first transverse plate 8, a second transverse plate 9 and a grouting hard pipe 10, wherein the vertical plate 7 is annularly arranged around the outer wall of a lower pile body 2, the top end of the vertical plate 7 is higher than the top surface of the lower pile body 2, the top end of the vertical plate 7 is connected with the first transverse plate 8 into a whole, the first transverse plate 8 extends to a metal welding plate 5 at the lower end of the upper pile body 1, the second transverse plate 9 is positioned under the first transverse plate 8, one end of the second transverse plate 9 is connected with the vertical plate 7 into a whole, the other end of the second transverse plate 9 extends to be in contact with the outer wall of an upper pile body 1, the lower end of the grouting hard pipe 10 sequentially penetrates through the first transverse plate 8 and the second transverse plate 9 to enter the cavity 6, and the grouting hard pipe 10 is in threaded connection with the first transverse plate 8 and the second transverse plate 9;
the concrete steps of connecting the upper end of the lower pile body 2 and the lower end of the upper pile body 1 through a connecting piece and injecting anti-corrosion slurry are as follows: the method comprises the steps of penetrating a connecting piece along the outer wall of an upper section of pile body 1, supporting a second transverse plate 9 through the top surface of a lower section of pile body 2, welding a first transverse plate 8 with a metal welding plate 5 at the lower end of the upper section of pile body 1, welding a vertical plate 7 with the metal welding plate 5 at the upper end of the lower section of pile body 2, synchronously injecting anti-corrosion slurry into a cavity 6 through a grouting hard pipe 10 during welding, judging whether the cavity 6 is filled with the anti-corrosion slurry or not by observing the grouting hard pipe 10, rotating the grouting hard pipe 10 to reach the bottom of the cavity 6 after the anti-corrosion slurry is solidified with the grouting hard pipe 10 to form a whole, and sealing the grouting hard pipe 10 through the anti-corrosion slurry.
And S4, continuously piling the pile foundation after pile splicing is finished through the pile driver, and repeating the steps S3 and S4 until the pile foundation reaches the design depth.
In above-mentioned technical scheme, the joint play of upper segment pile body 1 and lower segment pile body 2 is because being in deep weak soil stratum, corrodes easily very much, influences the pile foundation performance, consequently diminishes for the diameter between the pile foundation from the bottom up single section pile foundation with the pile foundation design gradually, fills the anticorrosion thick liquids through cavity 6 between the pile foundation of two different diameters to it is sealed through the connecting plate, realizes the anticorrosion construction that the pile foundation connects.
In another embodiment, the wall thickness of the pile body of the single-section pile is 90-120 mm.
In another embodiment, the bearing platform 3 and the pile body are integrally cast, so that the overall strength of the bearing platform is improved.
In another embodiment, a layer of self-adhesive glue 11 is coated in the slot 4, and the slot 4 and the channel platform 12 are sealed by the self-adhesive glue 11.
In another embodiment, in step S2, a pile tip is fixed to the bottom end surface of the lowermost pile shaft before pile driving.
In another embodiment, the distance between the horizontal bearing platform 3 and the top surface of the lower pile body 2 is 60-90 cm. .
In another embodiment, a plurality of grouting hard pipes 10 are arranged along the circumferential direction of the connecting piece, so that synchronous and rapid grouting is realized.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.
Claims (7)
1. A construction method of a deep soft soil pipe pile is characterized by comprising the following steps:
s1, pile making: the length of each single-section pile is 8-12 meters, and the inner diameter of the lower-section pile body is larger than the outer diameter of the upper-section pile body; a horizontal bearing platform is arranged on the inner wall of the upper end of the pile body, an inward-concave notch is formed in the upper surface of the bearing platform, and a metal welding plate is embedded in the outer wall of the upper end of the pile body; the bottom ends of all the pile bodies except the lowest pile body are provided with convex groove tables, the groove tables of the upper pile body are arranged to be capable of being inserted into the groove openings of the lower pile body, and the outer wall of the lower end of each pile body is embedded with a metal welding plate;
s2, piling: lofting a pile position by using a total station, driving a pile body into a designed position by using a pile driver, and if the perpendicularity deviation of the pile body is more than 1%, correcting the pile body and then driving the pile;
s3, pile splicing: the upper pile body is hoisted and mounted to the lower pile body, a groove platform of the upper pile body is ensured to be inserted into a groove opening of the lower pile body, a cavity is formed between the outer wall of the lower end of the upper pile body and the inner wall of the upper end of the lower pile body, the upper end of the lower pile body is connected with the lower end of the upper pile body through a connecting piece, and anti-corrosion slurry is injected;
the connector includes: the grouting hard pipe comprises a vertical plate, a first transverse plate, a second transverse plate and a grouting hard pipe, wherein the vertical plate is arranged around the outer wall of a lower pile body in a surrounding mode, the top end of the vertical plate is higher than the top surface of the lower pile body, the top end of the vertical plate is connected with the first transverse plate into a whole, the first transverse plate extends to a metal welding plate at the lower end of the upper pile body, the second transverse plate is located right below the first transverse plate, one end of the second transverse plate is connected with the vertical plate into a whole, the other end of the second transverse plate extends to be in contact with the outer wall of an upper pile body, the lower end of the grouting hard pipe sequentially penetrates through the first transverse plate and the second transverse plate to enter the cavity, and the grouting hard pipe is in threaded connection with the first transverse plate and the second transverse plate;
the concrete steps of connecting the upper end of the lower pile body and the lower end of the upper pile body through a connecting piece and injecting anti-corrosion slurry are as follows: the connecting piece penetrates through the outer wall of the upper pile body, the second transverse plate is supported through the top surface of the lower pile body, the first transverse plate and the metal welding plate at the lower end of the upper pile body are welded, the vertical plate and the metal welding plate at the upper end of the lower pile body are welded, anti-corrosion slurry is synchronously injected into the cavity through the grouting hard pipe during welding, and after the cavity is filled with the anti-corrosion slurry, the grouting hard pipe is rotated to enable the grouting hard pipe to reach the bottom of the cavity.
And S4, continuously piling the pile foundation after pile splicing is finished through the pile driver, and repeating the steps S3 and S4 until the pile foundation reaches the design depth.
2. The deep soft soil pipe pile construction method of claim 1, wherein the wall thickness of the pile body of a single-section pile is 90-120 mm.
3. The method for constructing a deep soft soil pipe pile according to claim 1, wherein the bearing platform and the pile body are integrally cast.
4. The method for constructing a deep soft soil pipe pile according to claim 1, wherein a layer of self-adhesive glue is coated in the notch.
5. The method of claim 1, wherein in step S2, a pile tip is fixed to the bottom end face of the lowermost pile body before piling.
6. The method for constructing a deep soft soil pipe pile according to claim 1, wherein the distance between the horizontal bearing platform and the top surface of the lower pile body is 60-90 cm.
7. The deep soft soil pipe pile construction method according to claim 1, wherein a plurality of grouting hard pipes are arranged along the circumferential direction of the connecting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110913393.5A CN113653044A (en) | 2021-08-10 | 2021-08-10 | Construction method of deep soft soil pipe pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110913393.5A CN113653044A (en) | 2021-08-10 | 2021-08-10 | Construction method of deep soft soil pipe pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113653044A true CN113653044A (en) | 2021-11-16 |
Family
ID=78491309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110913393.5A Pending CN113653044A (en) | 2021-08-10 | 2021-08-10 | Construction method of deep soft soil pipe pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113653044A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628474A (en) * | 2012-08-27 | 2014-03-12 | 上海中技桩业股份有限公司 | Manufacturing method for connecting hollow prestressed square piles by using bolts |
| CN203654277U (en) * | 2014-01-06 | 2014-06-18 | 崔杰 | Pile tip connecting device for pre-stressed concrete pipe pile/square pile |
| CN105887808A (en) * | 2016-05-31 | 2016-08-24 | 浙江工业大学 | Concrete pipe pile and construction method thereof |
| CN107059844A (en) * | 2017-03-23 | 2017-08-18 | 济南轨道交通集团有限公司 | A kind of quick pile splicing structure, prefabricated pile and method |
| CN108797587A (en) * | 2018-07-09 | 2018-11-13 | 江苏地基工程有限公司 | A kind of novel sinking construction technology of static pressed pile |
| CN111305198A (en) * | 2020-03-23 | 2020-06-19 | 中铁二院成都勘察设计研究院有限责任公司 | Connecting structure of prestressed concrete pipe pile and construction method thereof |
| CN111877308A (en) * | 2020-06-16 | 2020-11-03 | 中交第三公路工程局有限公司 | Hydraulic hammering type prestressed concrete pipe pile construction method for soft soil foundation |
-
2021
- 2021-08-10 CN CN202110913393.5A patent/CN113653044A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628474A (en) * | 2012-08-27 | 2014-03-12 | 上海中技桩业股份有限公司 | Manufacturing method for connecting hollow prestressed square piles by using bolts |
| CN203654277U (en) * | 2014-01-06 | 2014-06-18 | 崔杰 | Pile tip connecting device for pre-stressed concrete pipe pile/square pile |
| CN105887808A (en) * | 2016-05-31 | 2016-08-24 | 浙江工业大学 | Concrete pipe pile and construction method thereof |
| CN107059844A (en) * | 2017-03-23 | 2017-08-18 | 济南轨道交通集团有限公司 | A kind of quick pile splicing structure, prefabricated pile and method |
| CN108797587A (en) * | 2018-07-09 | 2018-11-13 | 江苏地基工程有限公司 | A kind of novel sinking construction technology of static pressed pile |
| CN111305198A (en) * | 2020-03-23 | 2020-06-19 | 中铁二院成都勘察设计研究院有限责任公司 | Connecting structure of prestressed concrete pipe pile and construction method thereof |
| CN111877308A (en) * | 2020-06-16 | 2020-11-03 | 中交第三公路工程局有限公司 | Hydraulic hammering type prestressed concrete pipe pile construction method for soft soil foundation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101018282B1 (en) | Method for constructing fabric for undergound tunnel | |
| CN106121658B (en) | Freezing method sinking shaft well wall supporting structure and construction method thereof | |
| CN105369799A (en) | Concrete precast pile of precast pile underground diaphragm wall and construction method of precast pile underground diaphragm wall | |
| JP2003232033A (en) | Foundation pile structure | |
| JP2022078187A (en) | Foundation construction method by pressing-in durable block for repairing foundation | |
| CN103924581A (en) | Underground continuous wall with prefabricated concrete-filled steel tube composite structure and method for constructing underground continuous wall | |
| CN104278671B (en) | Insert stiffness Soil-cement soldier pile and the construction method thereof of inverted cup shaped steel bucket | |
| CN206090547U (en) | Strength nature composite pile of dysmorphism | |
| CN106948337A (en) | The diaphram wall and its construction method of the wall of prestressing force assembled two unification | |
| CN113653044A (en) | Construction method of deep soft soil pipe pile | |
| CN110886294A (en) | PRC (prestressed concrete pipe) pipe pile for deep foundation pit supporting and pile splicing method thereof | |
| CN110700273A (en) | In-situ protection method for side-by-side masonry pipe trench crossing foundation pit | |
| CN211873023U (en) | Foundation pit supporting device | |
| CN111877308B (en) | Hydraulic hammering type prestressed concrete pipe pile construction method for soft soil foundation | |
| CN2730940Y (en) | Cast in situ pile of prefabricated reinforced concrete | |
| CN213233417U (en) | Combined pile and combined foundation | |
| CN115012947A (en) | Reverse construction method assembly type vertical shaft and construction method thereof | |
| CN211713946U (en) | Sleeve type prefabricated underground continuous wall with embedded steel bars | |
| CN111172991B (en) | Embedded steel bar sleeve type prefabricated underground continuous wall | |
| CN210887256U (en) | Straight combined sheet pile-ground wall-connecting type frame of water retaining cofferdam | |
| CN114575354A (en) | Detachable load assembly type pile anchor multistage supporting structure and construction method | |
| CN209891225U (en) | Prefabricated open caisson segment | |
| CN113684835A (en) | Foundation pit supporting and water stopping system and construction process | |
| CN111119200A (en) | Foundation pit supporting device | |
| CN112726649A (en) | Construction method of H-shaped steel structure and continuous wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211116 |